The HD PENTAX DA 35mm F2.8 Macro Limited lens has a new HD coating that should mean less flare and ghost images than the smc DA 35mm F2.8 macro lens. A lot of companies are adding different kind of coating to their premium lenses, which has shown that it makes a difference in the output of the images.

I don't know any photographers that don't love a great bokeh effect on their pictures. So it is great to see that Pentax/Ricoh have work hard to improve this effect in this lens. This is really important in macro pictures as you would like your subject to be sharp and the rest have a nice creamy background.